戴维尔氏手术的英文：
Daviel operation
n. 运转；行动；手术；运算
The operator O is the null operator.
算符O是零算符。
They are computer operators.
他们是计算机操作员。
monitor operator
之声监听员
It is a major operation. It is a very messy operation.
这是大手术，难度很大。
Has operator received pump instruction and operations manual?
操作者是否收到泵说明书和操作手册?